Has tuberculosis contributed to the global rates of cystic fibrosis?

Cystic fibrosis (CF) is not a disease new to modern history. It is speculated that people have died from the disease for hundreds if not thousands of years. If cystic fibrosis, which is terminal in the majority of patients, is in fact thousands of years old, how then has it persisted and even thrived for hundreds of generations rather than subsiding out over time?